Untitled

<?php

require 'functions.php';

	if( isset($_POST["login"])){
		$username = $_POST["username"];
		$password = $_POST["password"];

		$result = mysqli_query($conn, "SELECT * FROM users_admin WHERE username = '$username'");

		if ( mysqli_num_rows($result) === 1 ) {
			$row = mysqli_fetch_assoc($result);
			if (password_verify($password, $row["password"]) ){
				header("Location: index.php");
				exit;
			}
		}
		$error = true;
	}

 ?>
<!DOCTYPE html>
<html>
<head>
	<title>Login Administrator</title>
</head>
<body>
	<h1>Login Administrator</h1>

	<?php if (isset($error)) : ?>
		<p style="color: red; font-style: italic;">Username/Password Salah</p>
	<?php endif; ?>

	<form action=""	method="post"></form>
	<ul>
		<li>
			<label for="username">Username :</label>
			<input type="text" name="username" id="username">
		</li>
		<li>
			<label for="password">Password :</label>
			<input type="password" name="password" id="password">
		</li>
		<li>
			<button type="submit" name="login">Login</button>
		</li>
	</ul>
</body>
</html>